Retaining Wall Base Gravel Depth

These measurements will vary depending on block style and wall design contact rcp block brick for project specific measurements.
Retaining wall base gravel depth. If concrete is not being used to build the footing as is common for drystacked stone walls and very short walls the footing can simply consist of about 6 inches of compacted base material like angular sharp edged gravel. 150 mm plus an additional 1 in. Avoid having downspouts pointed at the retaining wall and if it s against the house keep soil and mulch well below the siding. Top this with 1 inch of coarse sand or small gravel before constructing the wall proper.
Similar to gravel paver base is a form of construction aggregate that contains crushed rocks such as limestone. Retaining wall base trench dig a base trench 24 in. The depth of your foundation should be 4 compacted crushed gravel plus one row of your cmu concrete modular units. Due to soil erosion your retaining wall should be built on a solid foundation made from paver base.
Daylight down slope and there should be a down slope so you control the surface water. Walls should rest on 3 4 minus or bank run gravel with the footer or wall base buried beneath the frost line 6 to 48 inches depending on region. But expect the depth to be approximately as deep as the height of one block unit plus 6 inches. And as wide as the width of one block unit plus 12 inches.
Behind that wall and sitting below the gravel is a perforated 4 pipe wrapped in landscape fabric and back filled with drain rock. To keep the bottom row of blocks from pushing outward bury the lowest section of a retaining wall. For deep frost use concrete block rather than retaining wall to ground level then build the retaining wall on that. A retaining wall must have the strength to hold back the weight of the soil plants and sometimes small structures behind it.
The general rule of thumb is to bury about one eighth of the height of the wall. After selecting the location and length of the wall excavate a base trench to the designed width and depth. 25 mm for each 1 ft 300 mm of wall height for the amount or buried block that is needed. Follow the block manufacturer s instructions for wall height limits.
The interlocking retaining wall block can be used to build walls up to 24 to 36 inches high depending on the size of the block. Choose a paver base with landscape rocks between 1 2 inch and 3 4 inch in size. The wall gets its strength from a sturdy base consisting of gravel.